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Tons and cubic yards of asphalt millings (recycled asphalt, RAP) for a driveway or parking area at your compacted depth.
With these inputs:
| Result | Value |
|---|---|
| Asphalt millings to order | 13.5 tons |
| Cubic yards to order | 8 yd³ |
| Compacted volume in place | 6.67 yd³ |
| At the light end (100 lb/ft³) | 10.8 tons |
| Area | 720 sq ft |
| Compacted depth | 3 in |
| Extra | 20% |
| Weight used | 125 lb/ft³ (1.69 t/yd³) |
| Coverage per ton at this depth | 53 sq ft |
FHWA's guidelines for reclaimed asphalt pavement give compacted RAP a maximum dry density of 100–125 lb/ft³ and stockpiled millings 120–140 lb/ft³. The calculator orders at 125 lb/ft³ so you are not short. Spread in 2–3 in lifts, wet lightly and roll or plate-compact; millings bind best on a hot day.
Asphalt millings are ground-up old asphalt pavement, sold by the ton as a cheap driveway surface that packs hard. Enter the area and the finished, compacted depth for the cubic yards and tons to order, using the Federal Highway Administration's figures for the weight of compacted recycled asphalt.
Area × compacted depth in feet ÷ 27 gives cubic yards; add about 20% and multiply by about 1.69 tons per yard (125 lb/ft³). A 60 × 12 ft driveway 3 in deep is 6.67 yd³ compacted, 8 yd³ with 20% extra, about 13.5 tons.
The FHWA reports milled recycled asphalt at 120–140 lb per cubic foot in the stockpile and a maximum dry density of 100–125 lb per cubic foot when compacted — about 1.35 to 1.69 tons per compacted cubic yard.
About 3 to 4 in compacted over a firm, well-drained gravel base. On soft ground build the gravel base first — the gravel driveway calculator sizes it — because millings alone will rut where the subgrade is weak.
At 125 lb/ft³, a ton covers about 64 sq ft at 3 in compacted and 48 sq ft at 4 in, before the extra for compaction and edges.
They pack hard rather than set like new asphalt: the old binder softens in summer heat and the pieces knit together under traffic and rolling. Compacting in thin lifts and rolling on a warm day gives the firmest surface.
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